10/03/2022

(Bulletin of the Atomic Scientists) Global Collapse Is In View

Bulletin of the Atomic Scientists - Robert Socolow

Robert Socolow

Author
Robert Socolow is professor emeritus in the Department of Mechanical and Aerospace Engineering at Princeton University.
From 2000 to 2019, he and Steve Pacala were the co-principal investigators of Princeton’s Carbon Mitigation Initiative, a twenty-five-year (2001-2025) project supported by BP.
His best-known paper, with Pacala, was in Science (2004): “Stabilization Wedges: Solving the Climate Problem for the Next 50 Years with Current Technologies.”
Socolow is a member of the American Academy of Arts and Sciences, an associate of the National Research Council of the National Academies, a fellow of the American Physical Society, and a fellow of the American Association for the Advancement of Science.
I am one of many researchers who considers it their job to help the public understand the threats ahead from climate change.

Embedded in nearly all of our future-oriented analyses is an assumption that global economic activity (global gross domestic product) will increase steadily throughout this century. No techno-economic model that I am aware of investigates global economic collapse.

Leaders in government and the private sector, who constitute the desired audience for such scenarios, would not wish to be seen taking global dysfunction seriously. But today, global economic collapse seems not inconceivable. It would result from an escalation of the current conflict in Ukraine that “goes nuclear.”

When I teach about climate change, I mention the assumption of continuous global economic growth in passing.

Dutifully, I say to my students something like: “This model assumes that no war or pestilence prevents global economic growth.” It’s a cautionary rhetorical moment that the students duly note, and then the students and I push on. But the same sentence does not feel rhetorical today.

Civilization is at risk. Humanity is confronting the possibility of careening backwards into a world of stagnation and misery.

Climate change is a manifestation of prosperity.

Other things being equal, climate change will arrive more slowly if greenhouse gas emissions from human activity plunge to a small fraction of their current value and stay down. Nuclear war could even bring “nuclear winter,” if the lofting of fire-generated aerosols into the stratosphere causes extensive cooling.

Members of my generation, who were young adults during the Cold War, have never been able to vacuum the possibility of nuclear war out of our brains.

The vast majority of the world’s younger people, however—as best I can tell—consider nuclear war a nightmare from the past whose risks were dealt with successfully long ago by their parents or grandparents.

No need even to learn about it. It is so over!

But evidently it isn’t! No friend I have sought out or pundit I have listened to this past week has provided me with a satisfactory explanation for Putin’s decision to make Russia’s nuclear weapons look usable. It seems reckless and in no way to his advantage.

I have long presumed that no leader or national security advisor anywhere would ever lose track of the objective of preventing escalation and would cease to appreciate that the one clear firebreak against escalation to Armageddon is the gap between non-nuclear and nuclear weapons. Why would anyone want to erode that boundary?

During the Cold War and in the decade after, those seeking to prevent nuclear weapons use included many Russian and Western scientists.

We saw our task as promoting mutual understanding, developing back channels for communication, inventing trust-building exercises, sharing the insights of arms control analysis, and safeguarding plutonium and highly enriched uranium. We made a difference.

I have the impression that the global scientific community’s current aggregate level of effort toward such objectives is substantially less than it was. I suspect one reason is that scientists, like so many others, found tensions between countries to be low enough to relax their efforts.

And another reason, probably, is that scientists came to see that they were less able to influence government decisions and priorities. They became less needed and less wanted.

It has become all too clear this past week that the global scientific community must reinvent the informal, cooperative, scientist-to-scientist relationships that once were so valuable. We must never again consider these relationships unnecessary, even if they are no longer as salient as they once were. Not just Russia’s scientists, but China’s too must participate. The Bulletin can help us.

A more profound mutual understanding may be achievable if the potentially contentious search for safeguards against the use of nuclear weapons is leavened with explorations of climate change.

No one can long ignore the interdependence of nations when studying the Earth’s atmosphere—a giant blender homogenizing the greenhouse gas emissions every one of us contributes.

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(AU ABC) Climate Change Already Pushing Up Food Prices, Causing Shortages And Will Get Worse, Report Says

ABC Gippsland - Jarrod Whittaker


A new report warns Australians can expect higher food prices and more shortages as temperatures increase. (ABC News: Pamela Medlen)

Key Points
  • A report says Australians are already paying more for food because of climate change
  • The report from Farmers for Climate Action says higher food prices and shortages will become more common as temperatures increase
  • One farmer says global warming and extreme weather is already making it harder to plan
Climate change is already increasing the price Australians pay for food and the problem will only get worse, a new report has warned.

The environment group Farmers for Climate Action, which commissioned the report, has warned global warming will lead to higher food prices and shortages for consumers. 

"Australia's food supply chain is more fragile than people think," report author Stephen Bartos said.

"We have seen examples in recent months of supermarkets running out of food, empty shelves.

"And that's something that, as climate change continues, is going to become an altogether more frequent occurrence."

The report warns drought is becoming more frequent and production is affected by lower crop yields, livestock stress, and higher operational costs.

It also found retailers would be hit by shorter shelf life, less reliability in the availability in some types of food, and lower nutritional value for products such as wheat and rice.

Australia's climate has risen by slightly more than 1 degree Celsius since 1910 and the report said it must be kept to below 2 degrees to prevent catastrophic consequences.

Climate change, war pushing prices higher

Russia's invasion of Ukraine is also expected to lead to higher food prices, with both countries major agricultural producers. (AP: Vitaly Timkiv)

Mr Bartos said, when he prepared the report, he was surprised to learn people were already paying more for food as a result of climate change. 

"One of the drivers is the fact that finance products, like bank loans and insurance, are becoming much more expensive for all of the players because of the uncertainty created by climate change," he said.

"There are higher costs at various different stages of the food supply chain in terms of dealing with the impacts of climate change, and that all gets passed on to consumers." 

The report also warned that, as well as climate change, risks to food supply could arise from other causes unconnected to global warming.

The Food Organisation of the United Nations' Food Price Index reported global food prices were up as much as 20 per cent on the year before.

There are also fears Russia's invasion of Ukraine will send wheat and barley prices soaring.

Climate making job harder, farmer says

Beef farmer Fergus O'Connor, from Victoria's South Gippsland region, said climate change was already making life more difficult for farmers.

South Gippsland beef farmer Fergus O'Connor is concerned about the effects of climate change and wants action to reduce emissions. (Supplied: Fergus O'Connor)
"Planning is so difficult with the climate that we've got at the moment, and farming is not easy in itself," Mr O'Connor said.

"We're always planning ahead. We're not planning ahead three weeks; we might be planning ahead three or four years."

He said climatic conditions had made that tougher and there was only one way to stop the problem from getting worse.
"It's quite simple. We have to cut emissions from fossil fuels," Mr O'Connor said.
He said Australia was "20 years behind Europe" and shifting to renewables would lead to lower power prices.

"We can all go down that path for a better, cleaner atmosphere, which will then in turn help farmers, because then they will be able to plan and things won't be in such extremes of hot and cold and wet and dry," Mr O'Connor said. 

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(AU ANU) Changes To Bird Behaviour Linked To Climate Change

ANU College of Science

Image Shutterstock

A new study from researchers at The Australian National University (ANU) rolls back the curtain on half a century of evidence detailing the impact of climate change on more than 60 different bird species. 

It found that half of all changes to key physical and behavioural bird characteristics since the 1960s can be linked to climate change. 

The other 50 per cent is due to other unknown environmental factors that have changed at the same time as our climate.  

The research, published in the Proceedings of the National Academy of Sciences and carried out in conjunction with James Cook University (JCU), focused on birds in the United Kingdom and the Netherlands. 

"We have shown that climate change is a major driver of these changes in the birds, but there is more at play here than we originally thought," lead author Dr Nina McLean, from the ANU Research School of Biology, said. 

"Not only were other unknown changes in the environment equally important in driving changes in the birds, surprisingly they generally did so in the same direction as climate change, such that their effects compounded.  

"This study shows that the impact of climate change does not act in isolation and its effects are occurring in a world where the resilience of wildlife is already pushed to the limits due to the many other challenges they are experiencing in a human-dominated landscape.  

"These non-climate change driven factors could include urbanisation, changing land use, habitat loss or introducing invasive species into ecosystems, but we can't know their identity for sure yet." 

The researchers analysed three key traits as part of their study: the timing of egg laying, body condition of birds, and the number of offspring produced. All the data was collected by volunteers, otherwise known as citizen scientists.  

The study found that across the board almost all birds laid their eggs earlier because of climate change. 

"For example, climate change caused chiffchaffs to lay their eggs six days earlier over the last 50 years, but other unknown environmental factors led to an additional six days, meaning in total they now lay their eggs 12 days earlier than they did half a century ago," Dr Martijn van de Pol, from the JCU College of Science and Engineering, said. 

Dr McLean said there are "winners and losers" of these environmental changes driven by rising temperatures.  

"For offspring number and body condition we see that it's a mixed bag," she said. 

"Some species are clearly increasing their body condition and offspring number, whereas others are suffering from it. 

"For example, garden warblers in the UK have experienced a 26 per cent decrease in their average number of offspring over the past half century, which is really concerning for the long-term fate of this species, but only half of this reduction, 13 per cent, can be attributed to climate change.  

"By comparison, the redstart experienced a 27 per cent increase in offspring numbers over the past half century, but again only part of that increase is due to global warming." 

The researchers say continued global warming could present a "double whammy" for species that are already struggling to adapt to other non-climatic environmental changes. 

"Rising temperatures, compounded with these unknown environmental factors, could pose a significant threat to the livelihoods of certain species that are already suffering," study co-author Dr Loeske Kruuk, also from ANU, said 

This study also involved researchers from the University of Edinburgh, the British Trust for Ornithology, Sovon Dutch Centre for Field Ornithology and the Dutch Centre for Avian Migration and Demography.

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